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10、 s micMora= g System The automatedseismicmonitoring systemthat wasdeployedintheZhezkazgan mines is capableofmonitoring al l thelocationsofthedepositbo勿.Thesystemconsistsofthetwo subsystems.The first one (RATS)wasdeployedseveralyears agoaroundthe areaof mining for purposesofregionalmonitoring.Itwasde
11、velopedandmanufacturedbytheKazgeofizika Design BureauofRep.Kazakhstan(see KVITKOandRAIZMAN, 1999).Thesubsystemconsistso#8 three-component wide-range SK-IPfieldseismic stationswith digital outputsconnectedviaradio channels to the central PC.Thesecondsubsystemisa mobile MOSDASseismicmonitoringnetworkd
12、esignedand manufacturedby theDMTGmbh,Essen, Germany.It alsoincorporatesanarray of 8three- component seismic sensors instal l edwithintheminerstown.Additionallythe subsystem incorporates 2 seismometers installedbelowthesurfacein the areaof miningtopr o vide bet t er84一一一工T Theory ind applic t ion一一一一
13、 ，一 一 一 一 Z o1.4 determination of hypocenters of seismic events.All sensors wereconnected via modem andradio channels to the cent r al PC unitresponsible for the accumulation, processing and storage of data. Both the RRTS and MOSDAShave 口100dBdynamic range and continuous automatic data recording. Al
14、lthe communication channels were synchronizedwitha quartz clock built into the cent r al PC unit andalsowithGPStime.Their frequencyranges of 500Hz correspondedtothe measuringinstruments.The I Mbbuffer memory was capableof storing upto 1004-secondrecords per channelThearraysintheexistingconfiguration
15、wer e capableofregisteringseismiceventsof energy grade 2 or higher at a hypocenter detection accuracy of several tenths of meters.Real seismicevents were selectedfromall recordedsignals bythe evaluationof several parametersincludingenergyofseismicsignal, number ofseismicstationsthat registered . sig
16、nal as well as the time differences in signal detec t ion by different stations.3.3. AmhsiscfSeivmcAdiykyinn= L -m gmNf im TheseismicactivityintheZhezkazgancopper mines isrelatively high (morethan500eventsa year). Fig. 3 shows a spatial distribution of epicenters of seismic events registered in 1998.Areas 主 圣2 0吸 0比0 峨 06 0 0曰0 3 】Xr t ， ) 飞 3 争蒯di守 b面em中ia tasofsemnicew assrcgm= di n 1 998atZhcA oz g gmmir e smarkedas I and2 amamesoffallsofcawg Ascanb
